1. Division of Infection Control and Disease Prevention Graduate School of Agricultural and Life Sciences, The University of Tokyo Tokyo Japan
2. Department of Veterinary Pathology, Faculty of Veterinary Medicine Vietnam National University of Agriculture Hanoi Vietnam
3. Laboratory of Veterinary Pathology Graduate School of Agricultural and Life Sciences, The University of Tokyo Tokyo Japan
4. Laboratory of Global Infectious Diseases Control Science Graduate School of Agricultural and Life Sciences, The University of Tokyo Tokyo Japan
5. Department of Veterinary Medicine Obihiro University of Agriculture and Veterinary Medicine Hokkaido Japan
6. National Institute of Veterinary Research Hanoi Vietnam
7. Laboratory of Environment Science for Sustainable Development Graduate School of Agricultural and Life Sciences, The University of Tokyo Tokyo Japan
8. Nippon Institute for Biological Science Tokyo Japan